scholarly journals Investigation of The impact of Unbalanced and Non-sinusoidal Supply Voltages on Converters.

2019 ◽  
Vol 2 (1) ◽  
pp. 73-78
Author(s):  
Rusdy Hartungi
Keyword(s):  
Experimental Tests ◽  
Input Voltage ◽  
Matrix Converter ◽  
Input Current ◽  
Positive Sequence ◽  
Space Vector ◽  
Current Modulation ◽  
Voltage Vector ◽  
Output Constraints ◽  
The Impact

In this paper two input current modulation strategies for matrix converters are experimentally analyzed under two different supply conditions: sinusoidal unbalanced voltages and non-sinusoidal balanced voltages. Both strategies use the Space Vector Modulation (SVM) technique in order to control the matrix converter accordingly to the input and output constraints. Strategy A modulates the input currents keeping the corresponding space vector in phase with the input voltage vector. Strategy B operates in order to keep the input current vector in phase with the positive sequence fundamental component of the input voltage vector. A comparison between the two strategies is made in terms of the reduction of the input current disturbances due to the unbalanced and non sinusoidal voltage on the grid. It is found that a dynamic current modulation strategy, independent of the voltage disturbances such as Strategy B, is more effective for the reduction of the RMS value of input current disturbances. The validity of the theoretical investigation i.e. the effectiveness of the current modulation strategy conforms to experimental tests result carried out on a matrix converter prototype.

scholarly journals Modified Space Vector Modulated Z Source Inverter with Effective DC Boost and Lowest Switching Stress

2010 ◽  
Vol 7 (1) ◽  
pp. 70 ◽  
Author(s):  
S. Thangaprakash ◽  
A. Krishnan
Keyword(s):  
Control Algorithm ◽  
Degrees Of Freedom ◽  
Control Strategies ◽  
Input Voltage ◽  
Duty Ratio ◽  
Space Vector ◽  
Voltage Vector ◽  
Voltage Stress ◽  
Capacitor Voltage ◽  
Full Utilization

 This paper presents a modified control algorithm for Space Vector Modulated (SVM) Z-Source inverters. In traditional control strategies, the Z-Source capacitor voltage is controlled by the shoot through duty ratio and the output voltage is controlled by the modulation index respectively. Proposed algorithm provides a modified voltage vector with single stage controller having one degree of freedom wherein traditional controllers have two degrees of freedom. Through this method of control, the full utilization of the dc link input voltage and keeping the lowest voltage stress across the switches with variable input voltage could be achieved. Further it offers ability of buck-boost operation, low distorted output waveforms, sustainability during voltage sags and reduced line harmonics. The SVM control algorithm presented in this paper is implemented through Matlab/Simulink tool and experimentally verified with Z-source inverter prototype in the laboratory. 

Study of Direct Torque Control System of Matrix Converter Multiple Voltage Vectors

2012 ◽  
Vol 588-589 ◽  
pp. 1615-1618
Author(s):  
Zhou Yue
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Direct Torque Control ◽  
Input Voltage ◽  
Torque Ripple ◽  
Matrix Converter ◽  
Torque Control ◽  
Voltage Vector ◽  
Simulation Results ◽  
Zero Voltage

In order to reduce torque ripple. Studied direct torque control of motor that fed by matrix converter. Illustrated control strategy the multiple voltage vector of matrix converter. Full utilize big and small input voltage of matrix converter synthesis long, short and zero voltage vector based on direct torque control of motor that fed by matrix converter, through the rational use of long, short and zero voltage vector to reduce torque ripple. The simulation results demonstrated that the validity of theoretical analysis and modulation strategy presented.

scholarly journals Realization of SVM Algorithm for Indirect Matrix Converter and Its Application in Power Factor Control

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Gang Li
Keyword(s):  
Power Factor ◽  
Power Flow ◽  
Experimental Tests ◽  
Input Power ◽  
Matrix Converter ◽  
Modulation Scheme ◽  
Space Vector ◽  
Zero Current Switching ◽  
Svm Algorithm ◽  
Bidirectional Power Flow

Compared with AC-DC-AC converter, matrix converter (MC) has several advantages for its bidirectional power flow, controllable power factor, and the absence of large energy storage in dc-link. The topology of MC includes direct matrix converter (DMC) and indirect matrix converter (IMC). IMC has received great attention worldwide because of its easy implementation and safe commutation. Space vector PWM (SVM) algorithm for indirect matrix converter is realized on DSP and CPLD platform in this paper. The control of the rectifier and inverter in IMC can be decoupled because of the intermediate dc-link. The space vector modulation scheme for IMC is discussed and the PWM sequences for the rectifier and inverter are generated. And a two-step commutation of zero current switching (ZCS) in the rectifier is achieved. Input power factor of IMC can be changed by adjusting the angle of the reference current vector. Experimental tests have been conducted on a RB-IGBT based indirect matrix converter prototype. The results verify the performance of the SVM algorithm and the ability of power factor correction.

scholarly journals High Performances of Five–Phase Induction Machine Feeding by A [3 × 5] Matrix Converter

2014 ◽  
Vol 65 (2) ◽  
pp. 83-89 ◽  
Author(s):  
Mohamed Mounir Rezaoui ◽  
Lazhari Nezli ◽  
Mohand Oulhadj Mahmoudi
Keyword(s):  
Induction Machine ◽  
Matrix Converter ◽  
Input Current ◽  
Phase Voltage ◽  
Current Modulation ◽  
Machine Drive ◽  
Three Phase ◽  
Control Matrix ◽  
Simulation Results ◽  
Four Quadrant

Abstract In this paper, we study an analytic technique to control matrix converter for a four-quadrant five-phase induction machine drive with use PWM five intervals modulation strategy. The multiphase induction machine is feeding by a matrix converter using a three-phase network. Special emphasis is given to the sinusoidal five phase voltage in the output and five phase voltage input current modulation. Simulation results are presented.

THE MATRIX CONVERTER INPUT CURRENT FORMATION IN THE CASE OF INPUT VOLTAGE DISTORTIONS

2016 ◽  
Vol 2016 (3) ◽  
pp. 33-35 ◽  
Author(s):  
V.М. Mykhalskyi ◽  
◽  
V.M. Sobolev ◽  
V.V. Chopyk ◽  
I.А. Shapoval ◽  
...  
Keyword(s):  
Input Voltage ◽  
Matrix Converter ◽  
Input Current ◽  
The Matrix
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